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Amount of Graphite mixed in lead pencils is : 20 – 60% , 20 - 70% , 20 - 80% , 20 - 90%
Colour of amethyst is : Red , Green , Violet , Yellow
The amount of Ozone is stratosphere is : 5 ppm , 10 ppm , 15 ppm , 20 ppm
A molecule of monoclinic sulphur contains sulphur atoms : 2 , 4 , 8 , 16
Oxidation of SO2 gas to SO3 gas is a reaction Exothermic , Endothermic , Irreversible , None of These
The acid used to clean sanitary wares is : HNO3 , H2SO4 , CH3COOH , HCl
Which steel is called stainless steel ? Nickel steel , Manganese steel , Silicon steel, Chromium steel
Iron occurs in : Kashmir , Chitral , Multan , Lahore
Which is the essential part of organic compound : Carbon , Nitrogen , Halogen, Oxygen
Which is used as thinner in preparation of paint? Xylol , Barium sulphate , Polyhydroxy phenol , Ghypsum
General formula of detergents is : R – C6H4 – SO-3 NA+ , R- C6H4 - SO-3 Mg+ , R C6H4 – SO-3 , R – C6H4 – SO-3